Extreme Circuits

  • Figure:1

    Heat Sensitive Switch

    Posted Apr 30, 2013 By Extreme Circuits
    At the heart of this heat-sensitive switch is IC LM35 (IC1), which is a linear temperature sensor and linear temperature-to-voltage converter circuit. The converter provides accurately linear and directly proportional output signal in millivolts over the temperature range of 0°C to 155°C. It develops an output voltage of 10 mV per degree centigrade change in the ambient temperature. Therefore...
  • Figure:2 Guitar Control Circuit Diagram

    Guitar Control

    Posted Apr 30, 2013 By Extreme Circuits
    Stand-alone, 9V battery powered unit, Three-level input selector, three-band tone control This preamplifier was designed as a stand-alone portable unit, useful to control the signals generated by guitar pick-ups, particularly the contact "bug" types applied to acoustic instruments. Obviously it can be used with any type of instrument and pick-up. It features a -10dB, 0dB and +10dB pre-set...
  • Figure:3 Circuit diagram

    Simple Oscillator / Pipe Locator

    Posted Apr 29, 2013 By Extreme Circuits
    Sometimes the need arises to construct a really simple oscillator. This could hardly be simpler than the circuit shown here, which uses just three components, and offers five separate octaves, beginning around Middle C (Stage 14). Octave # 5 is missing, due to the famous (or infamous) missing Stage 11 of the 4060B IC. We might call this a Colpitts 'L' oscillator, without the 'C'. Due to...
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